245306 has 4 divisors (see below), whose sum is σ = 367962. Its totient is φ = 122652.

The previous prime is 245299. The next prime is 245317. The reversal of 245306 is 603542.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 241081 + 4225 = 491^2 + 65^2 .

It is a super-3 number, since 3×245306³ = 44283890403337848, which contains 333 as substring.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61325 + ... + 61328.

2²⁴⁵³⁰⁶ is an apocalyptic number.

245306 is a deficient number, since it is larger than the sum of its proper divisors (122656).

245306 is a wasteful number, since it uses less digits than its factorization.

245306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122655.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 245306 is about 495.2837570525. The cubic root of 245306 is about 62.5992875216.

Adding to 245306 its reverse (603542), we get a palindrome (848848).

The spelling of 245306 in words is "two hundred forty-five thousand, three hundred six".